\begin{tabular}{@{\extracolsep{5pt}}lccccccccc}
\\[-1.8ex]\hline \hline \\[-1.8ex]
  & \multicolumn{2}{c}{(1)}  & \multicolumn{2}{c}{(2)}  & \multicolumn{2}{c}{(3)}  & \multicolumn{3}{c}{T-test}  \\
 & \multicolumn{2}{c}{Polarization}  & \multicolumn{2}{c}{Gridlock}  & \multicolumn{2}{c}{Special Interests}  & \multicolumn{3}{c}{Difference}  \\
    Variable & N & Mean/SE  & N & Mean/SE  & N & Mean/SE   & (1)-(2)  & (1)-(3)  & (2)-(3)  \\ \hline \\[-1.8ex] 
gender\_pre==Female & 1096 & \begin{tabular}[t]{@{}c@{}} 0.517 \\ (0.015) \end{tabular} & 1165 & \begin{tabular}[t]{@{}c@{}} 0.530 \\ (0.015) \end{tabular} & 1137 & \begin{tabular}[t]{@{}c@{}} 0.534 \\ (0.015) \end{tabular} &    -0.012 &    -0.017 &    -0.004 \rule{0pt}{0pt}\\
gender\_pre==Male & 1096 & \begin{tabular}[t]{@{}c@{}} 0.483 \\ (0.015) \end{tabular} & 1165 & \begin{tabular}[t]{@{}c@{}} 0.470 \\ (0.015) \end{tabular} & 1137 & \begin{tabular}[t]{@{}c@{}} 0.466 \\ (0.015) \end{tabular} &     0.012 &     0.017 &     0.004 \rule{0pt}{3ex}\\
Year of birth & 1094 & \begin{tabular}[t]{@{}c@{}} 1969.864 \\ (0.499) \end{tabular} & 1160 & \begin{tabular}[t]{@{}c@{}} 1969.984 \\ (0.485) \end{tabular} & 1136 & \begin{tabular}[t]{@{}c@{}} 1969.683 \\ (0.493) \end{tabular} &    -0.120 &     0.181 &     0.301 \rule{0pt}{3ex}\\
race==Caucasian & 1095 & \begin{tabular}[t]{@{}c@{}} 0.829 \\ (0.011) \end{tabular} & 1161 & \begin{tabular}[t]{@{}c@{}} 0.806 \\ (0.012) \end{tabular} & 1140 & \begin{tabular}[t]{@{}c@{}} 0.817 \\ (0.011) \end{tabular} &     0.023 &     0.013 &    -0.010 \rule{0pt}{3ex}\\
race==African-American & 1095 & \begin{tabular}[t]{@{}c@{}} 0.048 \\ (0.006) \end{tabular} & 1161 & \begin{tabular}[t]{@{}c@{}} 0.053 \\ (0.007) \end{tabular} & 1140 & \begin{tabular}[t]{@{}c@{}} 0.065 \\ (0.007) \end{tabular} &    -0.005 &    -0.017* &    -0.012 \rule{0pt}{3ex}\\
race==Hispanic & 1095 & \begin{tabular}[t]{@{}c@{}} 0.052 \\ (0.007) \end{tabular} & 1161 & \begin{tabular}[t]{@{}c@{}} 0.065 \\ (0.007) \end{tabular} & 1140 & \begin{tabular}[t]{@{}c@{}} 0.056 \\ (0.007) \end{tabular} &    -0.013 &    -0.004 &     0.008 \rule{0pt}{3ex}\\
race==Asian & 1095 & \begin{tabular}[t]{@{}c@{}} 0.028 \\ (0.005) \end{tabular} & 1161 & \begin{tabular}[t]{@{}c@{}} 0.031 \\ (0.005) \end{tabular} & 1140 & \begin{tabular}[t]{@{}c@{}} 0.024 \\ (0.005) \end{tabular} &    -0.003 &     0.005 &     0.007 \rule{0pt}{3ex}\\
race==Other & 1095 & \begin{tabular}[t]{@{}c@{}} 0.042 \\ (0.006) \end{tabular} & 1161 & \begin{tabular}[t]{@{}c@{}} 0.045 \\ (0.006) \end{tabular} & 1140 & \begin{tabular}[t]{@{}c@{}} 0.039 \\ (0.006) \end{tabular} &    -0.003 &     0.003 &     0.006 \rule{0pt}{3ex}\\
education==No high school degree & 1095 & \begin{tabular}[t]{@{}c@{}} 0.019 \\ (0.004) \end{tabular} & 1160 & \begin{tabular}[t]{@{}c@{}} 0.022 \\ (0.004) \end{tabular} & 1138 & \begin{tabular}[t]{@{}c@{}} 0.021 \\ (0.004) \end{tabular} &    -0.002 &    -0.002 &     0.000 \rule{0pt}{3ex}\\
education==High school degree & 1095 & \begin{tabular}[t]{@{}c@{}} 0.095 \\ (0.009) \end{tabular} & 1160 & \begin{tabular}[t]{@{}c@{}} 0.091 \\ (0.008) \end{tabular} & 1138 & \begin{tabular}[t]{@{}c@{}} 0.100 \\ (0.009) \end{tabular} &     0.004 &    -0.005 &    -0.010 \rule{0pt}{3ex}\\
education==Some college & 1095 & \begin{tabular}[t]{@{}c@{}} 0.225 \\ (0.013) \end{tabular} & 1160 & \begin{tabular}[t]{@{}c@{}} 0.226 \\ (0.012) \end{tabular} & 1138 & \begin{tabular}[t]{@{}c@{}} 0.221 \\ (0.012) \end{tabular} &    -0.001 &     0.004 &     0.005 \rule{0pt}{3ex}\\
education==Associate's degree & 1095 & \begin{tabular}[t]{@{}c@{}} 0.109 \\ (0.009) \end{tabular} & 1160 & \begin{tabular}[t]{@{}c@{}} 0.107 \\ (0.009) \end{tabular} & 1138 & \begin{tabular}[t]{@{}c@{}} 0.120 \\ (0.010) \end{tabular} &     0.002 &    -0.012 &    -0.013 \rule{0pt}{3ex}\\
education==Bachelor's degree & 1095 & \begin{tabular}[t]{@{}c@{}} 0.305 \\ (0.014) \end{tabular} & 1160 & \begin{tabular}[t]{@{}c@{}} 0.315 \\ (0.014) \end{tabular} & 1138 & \begin{tabular}[t]{@{}c@{}} 0.304 \\ (0.014) \end{tabular} &    -0.010 &     0.001 &     0.011 \rule{0pt}{3ex}\\
education==Post-graduate degree & 1095 & \begin{tabular}[t]{@{}c@{}} 0.247 \\ (0.013) \end{tabular} & 1160 & \begin{tabular}[t]{@{}c@{}} 0.241 \\ (0.013) \end{tabular} & 1138 & \begin{tabular}[t]{@{}c@{}} 0.234 \\ (0.013) \end{tabular} &     0.007 &     0.014 &     0.007 \rule{0pt}{3ex}\\
hh\_income==$0-$9,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.062 \\ (0.007) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.067 \\ (0.007) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.062 \\ (0.007) \end{tabular} &    -0.005 &     0.000 &     0.005 \rule{0pt}{3ex}\\
hh\_income==$10,000-$24,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.091 \\ (0.009) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.091 \\ (0.008) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.083 \\ (0.008) \end{tabular} &     0.000 &     0.008 &     0.008 \rule{0pt}{3ex}\\
hh\_income==$25,000-$49,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.196 \\ (0.012) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.195 \\ (0.012) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.168 \\ (0.011) \end{tabular} &     0.001 &     0.028* &     0.027* \rule{0pt}{3ex}\\
hh\_income==$50,000-$74,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.141 \\ (0.011) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.147 \\ (0.010) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.175 \\ (0.011) \end{tabular} &    -0.006 &    -0.034** &    -0.028* \rule{0pt}{3ex}\\
hh\_income==$75,000-$99,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.126 \\ (0.010) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.128 \\ (0.010) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.118 \\ (0.010) \end{tabular} &    -0.002 &     0.008 &     0.010 \rule{0pt}{3ex}\\
hh\_income==$100,000-$124,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.092 \\ (0.009) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.087 \\ (0.008) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.100 \\ (0.009) \end{tabular} &     0.005 &    -0.008 &    -0.013 \rule{0pt}{3ex}\\
hh\_income==$125,000-$149,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.048 \\ (0.007) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.048 \\ (0.006) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.051 \\ (0.007) \end{tabular} &     0.000 &    -0.003 &    -0.003 \rule{0pt}{3ex}\\
hh\_income==$150,000-$174,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.034 \\ (0.006) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.039 \\ (0.006) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.047 \\ (0.006) \end{tabular} &    -0.005 &    -0.012 &    -0.007 \rule{0pt}{3ex}\\
hh\_income==$175,000-$199,999 & 1077 & \begin{tabular}[t]{@{}c@{}} 0.020 \\ (0.004) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.021 \\ (0.004) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.022 \\ (0.004) \end{tabular} &    -0.000 &    -0.002 &    -0.002 \rule{0pt}{3ex}\\
hh\_income==$200,000+ & 1077 & \begin{tabular}[t]{@{}c@{}} 0.066 \\ (0.008) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.050 \\ (0.006) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.047 \\ (0.006) \end{tabular} &     0.016* &     0.019** &     0.003 \rule{0pt}{3ex}\\
hh\_income==Prefer not to answer & 1077 & \begin{tabular}[t]{@{}c@{}} 0.123 \\ (0.010) \end{tabular} & 1149 & \begin{tabular}[t]{@{}c@{}} 0.128 \\ (0.010) \end{tabular} & 1115 & \begin{tabular}[t]{@{}c@{}} 0.128 \\ (0.010) \end{tabular} &    -0.005 &    -0.006 &    -0.000 \rule{0pt}{3ex}\\
party7==Strong democrat & 1098 & \begin{tabular}[t]{@{}c@{}} 0.260 \\ (0.013) \end{tabular} & 1166 & \begin{tabular}[t]{@{}c@{}} 0.283 \\ (0.013) \end{tabular} & 1143 & \begin{tabular}[t]{@{}c@{}} 0.308 \\ (0.014) \end{tabular} &    -0.023 &    -0.047** &    -0.025 \rule{0pt}{3ex}\\
party7==Not very strong democrat & 1098 & \begin{tabular}[t]{@{}c@{}} 0.146 \\ (0.011) \end{tabular} & 1166 & \begin{tabular}[t]{@{}c@{}} 0.154 \\ (0.011) \end{tabular} & 1143 & \begin{tabular}[t]{@{}c@{}} 0.132 \\ (0.010) \end{tabular} &    -0.009 &     0.014 &     0.022 \rule{0pt}{3ex}\\
party7==Lean democrat & 1098 & \begin{tabular}[t]{@{}c@{}} 0.162 \\ (0.011) \end{tabular} & 1166 & \begin{tabular}[t]{@{}c@{}} 0.161 \\ (0.011) \end{tabular} & 1143 & \begin{tabular}[t]{@{}c@{}} 0.167 \\ (0.011) \end{tabular} &     0.001 &    -0.005 &    -0.006 \rule{0pt}{3ex}\\
party7==Pure independent & 1098 & \begin{tabular}[t]{@{}c@{}} 0.000 \\ (0.000) \end{tabular} & 1166 & \begin{tabular}[t]{@{}c@{}} 0.000 \\ (0.000) \end{tabular} & 1143 & \begin{tabular}[t]{@{}c@{}} 0.000 \\ (0.000) \end{tabular} & N/A & N/A & N/A \rule{0pt}{3ex}\\
party7==Lean republican & 1098 & \begin{tabular}[t]{@{}c@{}} 0.109 \\ (0.009) \end{tabular} & 1166 & \begin{tabular}[t]{@{}c@{}} 0.101 \\ (0.009) \end{tabular} & 1143 & \begin{tabular}[t]{@{}c@{}} 0.115 \\ (0.009) \end{tabular} &     0.008 &    -0.005 &    -0.013 \rule{0pt}{3ex}\\
party7==Not very strong republican & 1098 & \begin{tabular}[t]{@{}c@{}} 0.116 \\ (0.010) \end{tabular} & 1166 & \begin{tabular}[t]{@{}c@{}} 0.123 \\ (0.010) \end{tabular} & 1143 & \begin{tabular}[t]{@{}c@{}} 0.111 \\ (0.009) \end{tabular} &    -0.007 &     0.005 &     0.012 \rule{0pt}{3ex}\\
party7==Strong republican & 1098 & \begin{tabular}[t]{@{}c@{}} 0.207 \\ (0.012) \end{tabular} & 1166 & \begin{tabular}[t]{@{}c@{}} 0.178 \\ (0.011) \end{tabular} & 1143 & \begin{tabular}[t]{@{}c@{}} 0.167 \\ (0.011) \end{tabular} &     0.029* &     0.040** &     0.010 \rule{0pt}{3ex}\\
\hline \hline \\[-1.8ex]
%%% This is the note. If it does not have the correct margins, edit text below to fit to table size.
\multicolumn{10}{@{}p{1\textwidth}}
{\textit{Notes}:  The value displayed for t-tests are the differences in the means across the groups. ***, **, and * indicate significance at the 1, 5, and 10 percent critical level. }
\end{tabular}
